I flew the 1900 before I came to the CRJ so I already had the Bose X. There is no doubt that it is extremely quiet and has good fidelity but it took up a lot of room in my flight kit and seemed like overkill to me. I was looking for on-ear ANR headsets and went with the Telex 850; after using it for two years, in my opinion, it was made for cockpits like the 737 or the CRJ. Cockpits with enough wind noise that you'll want a little ANR without needing much are its forte because unlike the low pitch droning in a turboprop the wind noise is not nearly as harmful or hard to cancel out. The headset had great audio, is much less cumbersome than the Bose and is obviously much lighter (and half the price). My slogan for it would be "everything you need, nothing you don't." The Bose X is perfect for piston or turboprops but for jets I think its largely unnecessary.